Round 6: Tossup 1

A type of these objects may have formed inside of Population III “quasi-stars” or through the merger (15[2])of “intermediate-mass” counterparts. Katie Bouman’s CHIRP algorithm was used to image these objects using very-long-baseline (15[1])interferometry in the EHT collaboration. These objects' accretion disks (15[1])may emit large amounts of radiation to power (*) quasars (“KWAY-zars”). One of these objects lies inside the complex radio source Sagittarius A. (10[1])Most galaxies contain a “supermassive” example of these objects at their center. For 10 points, name these astronomical bodies which are so dense that light cannot escape their gravity. ■END■

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